Suction nozzle



Jan. 14, 193

G. E. LOFGREN SUCTION NOZZLE Filed May 19, 1954 2 Sheets-Sheet 1 ATTORE Jan, M 1936. G. E. LQ'FGREN SUCTION NOZ ZLE Filed May 19, 1934 2 Sheets-Sheet 2 ATTORNEY j UNITED, STATES- Patented Jan; 14, 1936 SUCTION NOZZLE Mi Elna: L'ofgremlye, N. Y allignor to Electrolnx Corporation, Dover, Del a corporation of Delaware Application May s, 1934, Serial No. 726,439 12 Claims. (01. -155) My invention relates to nozzles for vacuum cleaners and more particularlyto what I termupholstery nozzles. Nozzles so termed are in limited to upholsteries but are so termed to distinguish them from other nozzles, particularly object is to provide a novel and superior construction of the type of tool in question.

The invention will be understood by reference to the accompanying drawings showing several forms of the invention, and which are to be considered as part of this specification, and of which: Fig. 1 is a front view of a nozzle embodying the invention;

Fig. 2 is a cr-sectional view taken on'the line i--2f of Figs. I and 4; Fig. 3 is a bottom view of the nozzle; Fig. i is a sectionalview taken on the line of Figs. 2 and 3; Fig. 54s a perspective view of'the nozzle; Fig. 6 shows part of a second embodiment of the invention and is a front view;

Fig. 7 is a sec viewta ken on the line Fig. 8 is a top view of another p nozzle adapted to be secured to the in Figs. 6 and 7;

shown Fig. 9 is a cr-sectional view taken on the linet-stofliigti i Fig. id is a detail view taken in the direction it -it with respect to Fig. 8; and p Fig. 11 is a cross-sectional view similar to Fig 7, but with the part shown in Figs. 8 through 10 secured in place.

Referring to the embodiment shown in Figs. 1 to 5, the nozzle includes a shank In of generally tubular form and, adapted to fit onto the end of a hose connected with a source of suction, such as a unit including a dust bag, a fanand a motor. Front and back walls H and I2 and end walls It extend downwardly from the shank and are flared outwardlyto form an elongated mouth portion. The walls ii and 12 may be parallel as shown.

A bridge piece I4 is centrally disposed and extends between walls H and H. The bridge piece may be integral with the walls II and 12. Centrally disposed in the bridge piece is a vertical passage 18. The loweredge of this passage is or the substantially in line with the contacting edge l 'l of the nozzle. Passage I6 is in alignment with the internal passage of the shank portion Ill. The bottom of passage l6 forms a small nozzle opening. This nozzle is preferably round.

The bridge piece H divides the lower part of the space interior of the nozzle so as to form two lateral elongated openings IS. The lateral openings and the passage I 6 communicate centrally with the passage within the shank portion. 10

Grooves it are formed in the lower surface of the nozzle in the bridge piece It and extend to the outer edges as shown in Fig. 1. These grooves allow flow of air laterally of the nozzle in contact with the surface of the piece to be cleaned 1| and thereabout and this flow is tangential with respect to the opening at the bottom 'of passage It. Due to the tangential grooves it, air is drawn tangentially into the passage it and creates a rotary movement of air above the surface to be cleaned, whereby threads are twisted and spun and are picked up due to the cyclone movement of the air. The passme it, being directly in line with the center passage of the shank on 10, is subject to intense suction. A single opening, such as it, does not cover much surface and, therefore, the elongated openings permit removal of dust from a relatively large surface while the central portion can be run over any part of the surface to cleaned having threads or the like stic thereto.

The entire nomle may be cast in one piece as in this embodiment and may be made, for example, of aluminum.

In the embodiment :shown in Figs. 6 through 11 the nozzle is made in two parts, each part being stamped from sheet metal. As is shown particularly in Figs. 6 and I, the upper body part has a cylindrical portion 2| which is adapted to be secured to one end of a suction hose. Cylindrical portion 2| communicates with a flared portion 22 which is formed with an elongated suction opening 23. The material of the body portion it is flared outwardiyaround opening. to form a lip 24 which lies substantially in the plane of the opening. Notches 25 are formed in the central part of the body member 20 adjacent to the lower edge thereof.

A bottom member 28 is likewise stamped from sheet metal so as to have two elongated openings 21 adjacent to either end thereof. The bottom member comprises a rim portion 20 around the outer periphery of-which is formed a flange 28 at right angles to the rim portion. Rim portion 38 is also provided with upstanding flanges I0 which surround the two sides and outer ends of the elongated openings 21.

Openings 2! are separated by a central-bridge piece 3|, which connects opposite sides or rim 5 portion 28, the center of the bridge piece being stamped to form a circular passage 32. Communicating tangentially with the lower end of passage 32 are grooves 33 stamped in the bottom member. Portions of the material removed to form openings 21 are bent in a rounded form, as shown at 34, so as to formsmooth air passages. 'Outer flange 29 iswider, as shown at 35, adjacent to where the outer ends of grooves 33 extend through the flanges. Fig. 11 shows the body member and the bottom member 26 secured together. of the bottom member flt within the elongated opening 23 formed in the body member 20 and thus position the elongated openings 21 in the 20 bottom member in alignment with the opening air therebetween. 'I'he'parts 35 of flange 29 pre-' vent leakage of air through the notches outside of grooves 33.

30 The operation of this embodiment is substantially the same as in theembodiment first described and hence need not be repeated. 7 Although the bottom member is shown as bein permanently secured to the body member of the nozzle, it is obvious that a similar bottom member could be employed in connection with an ordinary nozzle and so constructed as tobe attachable and removable at will.

4 While I have shown and described more or less specific embodiments of my invention, it is to be understood that they do not constitute restrictions oi the scope thereof, which is intended to be limited only by the appended claims considered in the light of the prior art.

What I claim is:

1. An upholstery nozzle for vacuum cleaners, said nozzle having lateral suction openings, a central opening between, and terminating in the same plane with, said lateral openings and an-.

gularly disposed to a surface to be cleaned and of such shape that a vortex is formed on tangential admission of air thereto, a groove communicating with the atmosphere and connecting tangentially with said central opening and a common outlet communicating with said central and lateral openings.

2. An elongated upholstery nozzle for vacuum cleaners, said nozzle having outer walls and a bridge piece forming elongated lateral suction to openings, said bridge piece having a round opening thereinand a groove communicating with the atmosphere and connecting tangentially with said round opening. said openings and groove being in substantially the same plane and a common out-1 that a vort'ez is formed therein on tangential admission of air thereto, a groove communicating with the atmosphere and,connecting tangentially with the' last-mentioned opening, and a common 7 outlet communicating with said openings.

Flanges p n n 4. The combination with an upholstery nozzle for vacuum cleaners having walls forming an elongated opening 0t an attachment to be applied to the elongated opening for subdividing said opening into a plurality of openings and 5 having a small suction opening oi such shape that a vortex is formed therein on tangential admission of air thereto and having a groove communicating with the atmosphere and connectingtangentially with said small opening. m

5. The combination with anupholstery nozzle for vacuum cleaners having walls forming an elongated opening, of an attachment to be applied to the elongated opening ior subdividing said opening into-a plurality ofopenings and having 15 a small centrally disposed suction opening of such shape that a vortex is formed therein on tangential admission 01 air thereto and having a groove communicating with the atmosphere and connected tangentially with said small opening. 20

6. The combination withanupholstery nozzle ,for vacuum cleaners having walls forming an elongated opening, of an attachment to be applied to the elongated opening for subdividing said opening into a plurality oi openings and 25 having a small round suction opening and having a groove communicating with the atmosphere and connected tangentially with said small opening.

- '7. An upholstery nozzle for vacuum cleaners including a body member having walls forming an an elongated opening, said walls being flared outwardly around said opening, and an elongated apertured bottom member having a flange thereon, said flange being adapted to be bent over the flared part of said body member to secure said 3 bottom member to said body member, said bottom member having a centrally located bridge piece providing a plurality oi elongated suction openings, said bridge piece being formed with a central circular suction opening and having a 40 groove communicating with the atmosphere and tangentially communicating with said central op ni g.

8. As a new article of manufacture, a bottom member for a vacuum cleaner upholstery nozzle 45 including a rim portion bounding two elongated openings each adjacent to oneend thereof, a bendable. flange at the outer edge oi said rim portion, and a centrally located bridge piece connecting opposite sides 01' said rim portion and 50 separating said elongated openings, said bridge piece having a central circular opening therethrough and said rim portion having a groove tangentially communicating with said central 9. As a new article oi-manuiacture. a bottom member for a vacuum cleaner upholstery nozzle,-

said member being elongated and having an elongated opening adiacent each end thereof, and having a bridge piece separating said openings, to said bridge piece being formed with. a circular opening therethrough and said rim portion having a groove tangentially communicating with said central opening.

10. As a new article or manuIscture, a botu tom member for a vacuum cleaner upholstery nozzle, said member being elongated and having an elongated opening adjacent each end thereoi. and having a bridge piece separating said openings, saidbridge piece being formed with a circu- 7o lar opening therethrough. said rim portion having a groove tangentially communicating with said central opening, and said member having means for it; to the upper "part 01 said nozzle. v I ll mos-as 11. As a new article oi manufacture, a bottom member for a vacuum cleaner upholstery nozzle, said member being elongated and having an elongated opening adjacent each end thereof, and having a bridge piece separating said openings, said bridge piece being formed with a circular opening therethrough, said rim portion having a groove tangentially communicating with said central opening, and said member having a bendable iiange for securing it to the upper part of said nozzle.

12. An upholstery nozzle for vacuum cleaners including a body member having walls forming an elongated opening, said walls being flared out- 15 wardly to form a lip around said opening, and

an elongated bottom member having an elongated opening therethrough and an inner and an outer flange thereon, said inner flange fitting within the elongated opening in said body member to position said openings in alignment and said outer tiange being adapted to be bent over said lip to secure said bottom member to said body member, said bottom member having a centrally located bridge piece dividing said elongated openings into two parts. said bridge piece being formed with a central circular opening and said rim portion having a groove tangentially communicating with said central opening.

cus'rar 'EINAR nomann. 

